Re: [PATCH v8 03/15] x86: Secure Launch Kconfig

ross.philipson
2024-02-15T22:20:51Z

On 2/14/24 11:59 PM, Ard Biesheuvel wrote:
> On Wed, 14 Feb 2024 at 23:31, Ross Philipson <ross.philipson@oracle.com> wrote:
>>
>> Initial bits to bring in Secure Launch functionality. Add Kconfig
>> options for compiling in/out the Secure Launch code.
>>
>> Signed-off-by: Ross Philipson <ross.philipson@oracle.com>
>> ---
>> arch/x86/Kconfig | 12 ++++++++++++
>> 1 file changed, 12 insertions(+)
>>
>> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
>> index 5edec175b9bf..d96d75f6f1a9 100644
>> --- a/arch/x86/Kconfig
>> +++ b/arch/x86/Kconfig
>> @@ -2071,6 +2071,18 @@ config EFI_RUNTIME_MAP
>>
>> See also Documentation/ABI/testing/sysfs-firmware-efi-runtime-map.
>>
>> +config SECURE_LAUNCH
>> + bool "Secure Launch support"
>> + default n
>
> 'n' is already the default, so you can drop this line.

Ack

>
>> + depends on X86_64 && X86_X2APIC
>
> This depends on CONFIG_TCG_TPM as well (I got build failures without it)

Yes I will add that. I may have to add a couple of other things too.

Thanks
Ross

>
>> + help
>> + The Secure Launch feature allows a kernel to be loaded
>> + directly through an Intel TXT measured launch. Intel TXT
>> + establishes a Dynamic Root of Trust for Measurement (DRTM)
>> + where the CPU measures the kernel image. This feature then
>> + continues the measurement chain over kernel configuration
>> + information and init images.
>> +
>> source "kernel/Kconfig.hz"
>>
>> config ARCH_SUPPORTS_KEXEC
>> --
>> 2.39.3
>>
>